The nurse assessing a premature newborn infant auscultates a continuous machinery-like murmur.
This finding is associated with which congenital heart defect?
Pulmonary stenosis
Patent ductus arteriosus
Ventricular septal defect
Coarctation of the aorta
The Correct Answer is B
This is because a patent ductus arteriosus is a congenital heart defect that involves a defect in which the fetal shunt between the aorta and the pulmonary artery fails to close. This causes a continuous machinery-like murmur that can be heard on auscultation.
Choice A is wrong because pulmonary stenosis is a narrowing of the pulmonary valve or artery that obstructs blood flow to the lungs. It causes a systolic ejection murmur that is best heard at the upper left sternal border.
Choice C is wrong because the ventricular septal defect is a hole in the wall between the ventricles that allows blood to flow from the left to the right side of the heart. It causes a loud, harsh holosystolic murmur that is best heard at the left lower sternal border.
Choice D is wrong because coarctation of the aorta is a narrowing of the aorta that reduces blood flow to the lower body. It causes a systolic murmur that radiates to the back and weak or absent femoral pulses.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Swimming is one of the best sports for people with hemophilia because it strengthens the muscles without putting stress on the joints. Swimming is also recommended by most sports physicians and hematologists for patients with hemophilia.
Choice A is wrong because soccer is a contact sport that can cause injuries and bleeding episodes in people with hemophilia. Soccer is not recommended by most sports physicians or hematologists for patients with hemophilia.
Choice C is wrong because basketball is also a contact sport that can lead to injuries and bleeding episodes in people with hemophilia. Basketball may be safe for young children, but the risk increases with the intensity of the game.
Choice D is wrong because football is a collision sport that can cause severe injuries and bleeding episodes in people with hemophilia. Football is not recommended by most sports physicians or hematologists for patients with hemophilia.
Normal ranges for hemophilia are:
- Mild hemophilia: 5% to 40% of normal clotting factor
- Moderate hemophilia: 1% to 5% of normal clotting factor
Severe hemophilia: less than 1% of normal clotting factor
Correct Answer is A
Explanation
choice A.
Infant of an Rh-negative mother and a father who is Rh-positive and homozygous for the Rh factor.
Rh incompatibility occurs when a woman is Rh-negative and her baby is Rh-positive. This can cause hemolytic disease of the neonate (HDN), a condition where the mother’s antibodies destroy the baby’s red blood cells.
Choice B is wrong because if both the mother and the baby are Rh-negative, there is no risk of Rh incompatibility.
Choice C is wrong because if the father is heterozygous for the Rh factor, there is a 50% chance that the baby will be Rh-negative and not affected by Rh incompatibility.
Choice D is wrong because if both the mother and the baby are Rh-positive, there is no risk of Rh incompatibility.
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